"Google has bet big on mobile," said Vic Gundotra, vice president of engineering for Google's mobile group.

Gundotra and two of his colleagues shared some general data about mobile traffic to Google services but stuck with the company line on potentially controversial subjects like Android in China and Apple's lawsuit against HTC.

In the past two years, Google has seen mobile-search traffic grow by five times, Gundotra said. Those searches are not taking the place of computer-based search, he said. "When we see desktop usage decline, like when people go out to lunch, that's when we see mobile spike. We think these are brand-new searches that we would never have seen previously," he said.

In addition to search, Google plans to optimize all of its services for mobile users and has had some notable success doing so already. For instance, Gundotra said that there are now 50 million active users of Google Maps for Mobile.

The company is hopeful that its investments in mobile advertising will pay off. Currently, 25 percent of Android and iPhone users who download applications spend up to two hours a day using those applications, Gundotra said. That presents an opportunity for Google in advertisements that appear in applications. It is testing an application advertisement system with hand-picked applications including Urbanspoon, a restaurant finder, and Shazam, through which users can buy and chat about music.